Well, it could be about Jedi or Sith characters finding themselves in the Tokyo Ghoul universe. Maybe a Jedi has to use the Force to deal with the ghouls' kagune. They might try to bring peace between humans and ghouls, like they do in their own galaxy with different species.
The Jedi would likely approach the ghouls with caution at first. They would try to understand their nature and see if there's a way to coexist. For example, Obi - Wan Kenobi might try to negotiate with the ghoul leaders. The Sith, on the other hand, might see the ghouls as potential minions or tools. Darth Maul could try to use the chaos of the Tokyo Ghoul world to his advantage.
One popular crossover idea could be with 'Attack on Titan'. Picture Tokyo Ghoul characters in the world of Titans, fighting alongside or against the Survey Corps. Another could be with 'Fullmetal Alchemist', where the alchemical concepts might interact with the ghoul powers. For example, an alchemist trying to find a way to cure the ghouls or control their kagune.
When writing a Tokyo Ghoul crossover fanfic, focus on character development. If it's a crossover with 'Fairy Tail', show how the Fairy Tail mages react to the existence of ghouls. Some might be scared, while others might be curious. Build a world where the two universes blend well. For example, in a city where Fairy Tail mages and ghouls co - exist, there could be new laws and power dynamics. And don't forget to add some emotional depth, like a ghoul falling in love with a human mage and the struggles that come with it.
I would cast actors who can convey complex emotions well. For example, Taron Egerton. He has shown great acting skills in various movies and could bring out the internal struggle of a character in a Tokyo Ghoul fanfic. His ability to transform physically and emotionally would be perfect for the role.
The plot might focus on the struggle for identity that both Kaneki and Shinichi face. Kaneki is caught between his human and ghoul sides, while Shinichi has to deal with having a parasite in him. In the crossover fanfic, they could exchange their experiences and learn from each other. They might also encounter a new type of being that combines the traits of ghouls and parasites, which forces them to re - evaluate their own identities and how they fit into this new world of the crossover.
The plot could involve the ghouls from Tokyo Ghoul being brought into the Avengers' world. Maybe the Avengers initially mistake the ghouls for new, dangerous threats. But as they learn more about the ghouls' situation, they might try to find a way to co - exist. For example, Kaneki could share his story with the Avengers, and they could be sympathetic. Then they could team up to fight a common enemy, like a new type of super - villain who wants to use the power of ghouls for evil purposes.
It depends on personal preferences. Some people might think Tokyo Ghoul is better for its original story and character development. Others might prefer Tokyo Ghoul:Re for its continuation and new plot twists.
Hermione would probably be extremely curious about the ghouls. She'd want to study their biology, especially the kagune. She might even try to find a way to use her magic to help the half - human, half - ghoul characters like Kaneki deal with their identity crisis.